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Ultimaker 1 and 1.75 filament

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Posted · Ultimaker 1 and 1.75 filament

Hello experts.

Anyone of you tried to convert the Ultimaker 1 to use 1.75 filament?

I found this procedure:


It looks quite straightforward, but I'd like to ask your exeperience if someone tried to do it and if there is something specific to know.

Thanks for your help.



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    Posted · Ultimaker 1 and 1.75 filament

    I have a previous thread about converting the UM1 to 1.75 and its Pros and Cons. We decided the benefits of 3mm outweigh the benefits of 3mm.


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    • 2 weeks later...
    Posted · Ultimaker 1 and 1.75 filament

    Imho there is a simple case that favors 3mm filament over 1.75mm:


    Both 3mm (which is actually 2.85mm) and 1.75mm filaments are manufactured with +-0.05mm diameter tolerance. 1.75mm doesn't go lower than 0.05mm (I believe that is pretty much impossible anyways).


    2.85mm +-0.05mm = 1.8% diameter error tolerance

    1.75mm +-0.05mm = 2.9% diameter error tolerance

    Note that there is also +-0.1mm tolerance filament. This would make things even worse for 1.75mm filament (5.7% diameter error tolerance vs 3.5% for 3mm).

    So to me it's clear that 3mm filament should be favored over 1.75mm, because variations in filament diameter result in uneven extrusion which gets you bad prints.


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    Posted · Ultimaker 1 and 1.75 filament

    On the other hand, with 1.75mm you have less volume in the melting chamber, which results in better retractions. And you need a weaker feeder for 1.75.


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    Posted · Ultimaker 1 and 1.75 filament

    Agreed. However, for UM purposes, 3mm is far superior.


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